Floor-scraper



c. HEY.

I F LO0R SCRAPER.

APPLICATION FILED MAR. 28, I918.

Patented J uly 29, 1919.

avwamtoz TljiE COLUMBIA PLANDGRAPH co, WASHINGTON, D. c.

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CHARLES TACY, OF BATAVIA, NEW YORK.

FLOOR'SCBIAPEBI.

Specification of Letters Patent.

Patented July 29,1919.

Application filed March 28, 191 8. Serial No. 225,333.

To all whom it may concern:

Be'it known that 1, CHARLES TACY, a citi zen of the United States, residing at Batavia, in the county of Genesee and State of New York, have invented certain new and useful Improvements'in Floor-Scrapers, of which the following is a specification.

This invention relates" to floor scraping machines and has for its object to provide a new and improved means whereby such a machine is made to do both the leveling and the finishing of the floor. Another object of this invention is to provide a new and improved form of clamping means for the scraping knives of the machines. V

Another object of this invention is to provide means whereby the weight of the ma- ,chine may the varied to adapt it to the needs of the operator. I

This and other objects of this invention willfloe fully illustrated in the drawings, de scribed in the'specification and pointed out in the claim at the end thereof.

In the accompanying drawings,

Figure 1 is a top plan view of the machine.

Fig. 2 is a vertical sectional view of the machine, the section being taken on the line 2 -2 of Fig. 1.

Fig. 3 is a vertical section through the knife holder, the section'being taken on the line 33- 3 of Fig. 2.

In the several like reference numerals indicate like parts.

Floor scrapers in general are designed with a view of making them a certain weight which the designer thinks proper and necessary for the efficient working of the machine. This weight is always fixed and can not be varied for work on various grades of work. To overcome this objection, the machine shown in the accompanying drawings, comprises a supporting frame 1 which is bent up of sheet metal with a blunt, wedged shaped knife carrier 2 attached to the front thereof. The frame 1 comprises a sheet metal strip which is bent up to form the sides 3 and 4 with the end 5 connecting them together at one end thereof. At the opposite end the sides 3 and 14 are 'bent so as to slightly converge toward each other and these ends are connected together by the strap 6 as shown in Fig. 1.

The converging ends of the sides 3 and 4: project beyond the strap 6 and have attached thereto the nose piece 2 which preffigures of the drawings,

erably consists of a casting provided with suitable means to carry the scraping knives as will hereinafter be described.

The sides of the nose piece 2 are attached to the ends of the sides 3 and 1 and form sides and nose piece 2 and the sides of the frame 1 flush with one another, the ends of the sides of the nose piece are reduced in thickness on the outside an amount sufficient to receive the thickness of the sides 3 and 4 so that after the ends of the sides 3 and 1 are lapped over and fastened to the ends of the sides of the nose piece, the joint between them will berfiush.

The frame 1 is'supported on the rollers 7 and 8 which are mounted on the axle 9, which in turn is mounted in the bearings 10 and 11 provided on the sides 3 andl. If desired, the wheels 7 and 8 may be inclosed in the casings 12 and 13, formed by the straps 1 1 and 15 which are suitably fastened to the inside ofthe sides of the frame 1. In addition to this, the axle 9 may also be inclo-sed in the casing 14", which is mounted on the bottom 15, fastened to the sides and ends of the frame 1. This bottom 15 transforms the frame 1 into a casing or receptacle which can be loaded with the weight to suit the operator of the machine and the grade of work which is to be done with the machine.

As will be seen from an inspection of Fig. 2, the machine is mounted so as to stand at an angle to the floor on which it is to operate. For this reason, the bottom of the frame 1 and a portion of the nose iece 2 is lifted up at an angle from the oor by the wheels 7 and 8, while the extreme front end of the nose piece 2 stays parallel thereto and holds the scraping knife in contact therewith.

On top of thesides 2 and 3 of the frame 1 are provided the lugs 16 and 17 on which the yoke 18 is mounted to swing. This yoke has the handle 19 attached thereto, by means of which the machine is operated. The handle can be held at any desired elevation to accommodate the needs of the operator by means of the guides 20 and 21 which project upwardly on both sides of the frame and close to the sides of the yoke. Holes 22, 22 are drilled into one or both of these guides which are adapted to register with similar holes in the sides of the yoke through which a pin 23 may be inserted so as to project into continuations thereto. In order to make the the desired hole in the guide to lock the yoke:

' to the'guide at the desired elevation.

' The cutting or scraping is done'with the knives mounted in the nose piece of the machine. For this purpose, the nose piece is provided with a vertical pocket 24 in which 1 are adj 'ustably clamped the knives 25 and 26. V The knife 25 is held in place at a point 26 and in turn forces the adjusting wedge 30 against the knife 25.. v j

. The knife 25 is held slightly inclined toward the bottom of the front end of the nose piece, while the knife 26 is clamped in .a

7 vertical or upright position for a, purpose that will presently appear, V The knife 26, when used, operates to do the leveling or rough work, and for this purpose is lowered andmade to project out below the pocket 24L and clamped in place in this position by means of the setscrews 27 and28. It will be understood that when the knife 26 is used, the knife 25 is raised so as not to come in contact with the floor and it is only afterthe floor has beenleveled off that the knife25 isadjusted to do the finishing, whilethe kni-fe26 is elevatedor raised from the floor, I I V ,The adjustable wedge30is providedwith apair of lugsBl and 32whieh are adapted to vrest on suitable shoulders provided 011 the. sides of the pocket 24 to prevent the wedge from fallingout at the bottom when released by the set screws 27 and 28. For the same reason, the clampingplate 29 has suitable recesses provided'therein, into which project theends of the set screws .27 and 28 so Copies of this patent maybe obtained for as to loosely suspend thereon the plate 29 after the knives are released by the set screws; In this manner, all of the parts forming the clamping mechanism are held in place while the knives are released, which permits the knives to be adjusted with ease and clamped back in place in their adjusted position. v

The bottom of the wedge 30 and the clamping plate 29iare hollowedtout as shown in-Fig. 2 to permit the shavings from the knives 25 and 26 to. pass outbehind them so as-notto interfere :with the cutting operations thereof; 7

- The receptacle formed by the frame of the machine can always be-loaded with a weight suflicient to makeeither of theknives' cutiefs ficiently and. this weight may be varied to accommodate'the needs of the operator. 7 r In operation, the machine is-drawn over the floor which is to be .finishedso that-only the weight of the frame operatesto holdjthe knife in thecutting position; j

I'claim; v v I In a floor scraper, the combination ,of a

frame, a knife carrier mountedin frontiof said frame, said knife carrier comprising a 7 vertical socket, a pair of scraping knives adapted to pass through said socket and projectout below thereof,a wedge insaid' socket, andinterposed between said knives,

an adjustableclampingplate adapted to i i CHARLES morclamp said knives and wedgein place in l/Vitness: t ERIQ ISOHVINGER, a

five cents each,; by addressing the Commissioner of Patents, Washington, D. G, 

